Corrigendum to: Habitat associations of zoophagic bat ensembles in north-western Australia

North-western Australia comprises the Kimberley Craton and parts of three adjacent sedimentary basins. It has a tropical climate and habitats that range from semiarid plains supporting grasslands to mesic uplands supporting woodlands as well as narrow riparian forests and patches of rainforest; mangrove forests occur along the coast. Its bat fauna comprises three obligate phytophages and 27 obligate zoophages. Analysis of zoophagic bats at 171 sites scattered throughout this study area revealed two compositionally distinct ensembles. One, comprising 19 species, occupies mangrove forest and includes three species known only to occupy mangroves in Western Australia. The other, comprising 20 species, occupies landward habitats and includes four species that are found only in landward ecosystems. Both ensembles are structured in terms of resource allocation, but nestedness observed in assemblage composition can be explained by environmental factors, implying the influence of environmental controls. Sixteen species belong to both ensembles, but seven of these require cave roosts and occur only near cavernous country while three others are confined to rocky riparian habitats. The richest assemblages were recorded in rugged cavernous landscapes in complex vegetation structures near permanent freshwater pools in the most mesic areas.

Download Full-text

EVALUASI KUALITAS VISUAL LANSKAP DI KAWASAN HUTAN MANGROVE SUKADANA KABUPATEN KAYONG UTARA

AKSEN ◽

10.37715/aksen.v4i2.1312 ◽

2020 ◽

Vol 4 (2) ◽

pp. 19-30

Author(s):

Irawan Setyabudi ◽

Deril Aria Permana

Keyword(s):

Mangrove Forest ◽

Visual Quality ◽

Mangrove Forests ◽

Scenic Beauty ◽

Area Of Interest ◽

Visual Potential ◽

Vegetation Structures ◽

The Tropics ◽

River Mouths

Mangrove forests are specific vegetation structures and grow along coastlines in the tropics, river mouths, and are affected by tides. Its existence supports many ecosystems such as nutrient cycling and fisheries production. This condition is supported by high visual potential and natural resources that make mangrove forests a tourist destination. In the Sukadana Mangrove forest, visitors have different preferences regarding interesting spots. This is evidenced by the accumulation of the number of visitors at a certain point. According to preliminary data obtained, there has been a decrease in the number of visitors since the opening of the tourist sites in 2017, approximately 50% per year. The contributing factor is the lack of development, so the visual impression tends to be monotonous. The problem in this study is the need for evaluation efforts in the form of an assessment of the visual quality of the Sukadana Mangrove Forest landscape. The purpose of this study is the presence of visual quality values can facilitate efforts to preserve certain areas in order to achieve sustainable ecotourism. The analytical method used Scenic Beauty Estimation (SBE), is a quantitative method for assessing the aesthetics of the landscape based on visitors’ perceptions by comparing one point to another. The results obtained are that visitors prefer landscapes with natural ambience and boardwalk facilities for taking selfies, while dirty, dry and damaged facilities will be avoided. The conclusion of this study is that the Sukadana mangrove forest has a certain area of interest to visitors, as evidenced by the values in the SBE analysis.

Download Full-text

GEOLOGY OF THE OFF-SHORE AREAS OF NORTH-WESTERN AUSTRALIA

The APPEA Journal ◽

10.1071/aj62002 ◽

1963 ◽

Vol 3 (1) ◽

pp. 10 ◽

Cited By ~ 1

Author(s):

N. BOUTAKOFF

Keyword(s):

Continental Shelf ◽

Western Australia ◽

Sedimentary Basins ◽

Outer Edge ◽

The Other ◽

General Area ◽

Folding Intermediate ◽

North West ◽

Exmouth Gulf ◽

North Western

CONTOURING of Admiralty Chart No. 475 "North West Coast of Australia with the Off-lying Island and Reefs", 1928-1950, has revealed the existence of a number of offshore ridges along the outer edge of the Australian Continental Shelf. These ridges connect the coastal ranges of Exmouth Gulf in Western Australia with Sahul Banks, opposite Timor. Some of them are very large features and they are separated from the Continental Shelf by pronounced troughs. On the other hand, an even deeper trough separates them from the islands of Timor, Roti and Sawu. Other swells, rising almost to sea level, run parallel with them further out to sea. Geological comparisons are drawn which suggest that a deep stratigraphic section may be present in the general area where these ridges occur. Evidence is also presented to show that these features are tectonically and positively active, whereas the bounding troughs are in process of structural sinking. The size of some of these ridges, which approach the dimensions of the Lesser Sunda Islands, suggest that they are largely submerged and complex folded ranges, of which considerable parts are accessible to exploration. It is shown that these ranges all occur within the boundaries of Teichert's "Westralia Geosyncline". It is suggested that folding, intermediate in in tensity between the Alpine nappes of Timor-Roti and the gently warped sediments of the continental sedimentary basins of Australia, may be present in them.If so, these somewhat sharper folds may prove to be suitable for considerable accumulation of petroleum, as so often happens in the fore-front folds of other Alpine belts.

Download Full-text

Habitat associations of zoophagic bat ensembles in north-western Australia

Australian Journal of Zoology ◽

10.1071/zo19049 ◽

2020 ◽

Author(s):

N. L. McKenzie ◽

R. D. Bullen ◽

L. A. Gibson

Keyword(s):

Western Australia ◽

Habitat Associations ◽

North Western

Download Full-text

Economic value analysis of mangrove forest ecosystems in Sorong, West Papua Province

AQUATIC SCIENCE & MANAGEMENT ◽

10.35800/jasm.0.0.2014.7305 ◽

2014 ◽

pp. 39

Author(s):

Roger R Tabalessy

Keyword(s):

Mangrove Forest ◽

Economic Value ◽

Forest Degradation ◽

Primary Data ◽

Mangrove Forests ◽

Value Analysis ◽

Human Needs ◽

The People ◽

West Papua ◽

Mangrove Wood

Coastal areas can either meet the human needs or give great contribution to the development. However, rapid infrastrural development in Sorong, west Papua, has been followed by high demand for mangrove timber and caused mangrove forest degradation due to exploitation. This exploitation could also result from high economic value of the mangrove timber. This study was done to analyze the economic value of mangrove wood utilized by the people to support the development process in Sorong. This study used primary data obtained through interviews and the economic value calculation of mangrove forests. It found that Sorong had mangrove economic value of IDR 165,197,833, 491. Wilayah pesisir selain dapat memenuhi kebutuhan hidup manusia juga memberikan kontribusi yang besar bagi pembangunan. Cepatnya pembangunan infrastruktur di Kota Sorong diikuti pula dengan tingginya permintaan akan kayu mangrove dan menyebabkan terjadinya degradasi hutan mangrove akibat eksploitasi. Eksploitasi ini disebabkan juga akibat kayu mangrove memiliki nilai ekonomi. Penelitian yang dilakukan ini bertujuan untuk menganalisis nilai ekonomi kayu mangrove yang dimanfaatkan oleh masyarakat Kota Sorong dalam proses menunjang pembangunan. Penelitian ini menggunakkan data primer yang diperoleh melalui hasil wawancara dan perhitungan nilai ekonomi hutan mangrove. Hasil penelitian ini menunjukkan nilai ekonomi ekosistem hutan mangrove yang berada di Kota Sorong adalah Rp165.197.833.491.

Download Full-text

Large‐scale eDNA metabarcoding survey reveals marine biogeographic break and transitions over tropical north‐western Australia

Diversity and Distributions ◽

10.1111/ddi.13228 ◽

2021 ◽

Author(s):

Katrina West ◽

Michael J. Travers ◽

Michael Stat ◽

Euan S. Harvey ◽

Zoe T. Richards ◽

...

Keyword(s):

Western Australia ◽

Large Scale ◽

North Western

Download Full-text

Mangrove Forest Landcover Changes in Coastal Vietnam: A Case Study from 1973 to 2020 in Thanh Hoa and Nghe An Provinces

Forests ◽

10.3390/f12050637 ◽

2021 ◽

Vol 12 (5) ◽

pp. 637

Author(s):

Huong Thi Thuy Nguyen ◽

Giles E. S. Hardy ◽

Tuat Van Le ◽

Huy Quoc Nguyen ◽

Hoang Huy Nguyen ◽

...

Keyword(s):

Mangrove Forest ◽

Monsoon Season ◽

Coastal Development ◽

Northern Coast ◽

Mangrove Forests ◽

Visual Interpretation ◽

Mangrove Restoration ◽

Coast Of Vietnam ◽

Landsat Satellite

Mangrove forests can ameliorate the impacts of typhoons and storms, but their extent is threatened by coastal development. The northern coast of Vietnam is especially vulnerable as typhoons frequently hit it during the monsoon season. However, temporal change information in mangrove cover distribution in this region is incomplete. Therefore, this study was undertaken to detect change in the spatial distribution of mangroves in Thanh Hoa and Nghe An provinces and identify reasons for the cover change. Landsat satellite images from 1973 to 2020 were analyzed using the NDVI method combined with visual interpretation to detect mangrove area change. Six LULC classes were categorized: mangrove forest, other forests, aquaculture, other land use, mudflat, and water. The mangrove cover in Nghe An province was estimated to be 66.5 ha in 1973 and increased to 323.0 ha in 2020. Mangrove cover in Thanh Hoa province was 366.1 ha in 1973, decreased to 61.7 ha in 1995, and rose to 791.1 ha in 2020. Aquaculture was the main reason for the loss of mangroves in both provinces. Overall, the percentage of mangrove loss from aquaculture was 42.5% for Nghe An province and 60.1% for Thanh Hoa province. Mangrove restoration efforts have contributed significantly to mangrove cover, with more than 1300 ha being planted by 2020. This study reveals that improving mangrove restoration success remains a challenge for these provinces, and further refinement of engineering techniques is needed to improve restoration outcomes.

Download Full-text

Assessing the Natural Recovery of Mangroves after Human Disturbance Using Neural Network Classification and Sentinel-2 Imagery in Wunbaik Mangrove Forest, Myanmar

Remote Sensing ◽

10.3390/rs13010052 ◽

2020 ◽

Vol 13 (1) ◽

pp. 52

Author(s):

Win Sithu Maung ◽

Jun Sasaki

Keyword(s):

Neural Network ◽

Change Detection ◽

Transfer Learning ◽

Mangrove Forest ◽

Kappa Coefficient ◽

Mangrove Forests ◽

Ann Model ◽

Shrimp Ponds ◽

Natural Recovery ◽

Sentinel 2

In this study, we examined the natural recovery of mangroves in abandoned shrimp ponds located in the Wunbaik Mangrove Forest (WMF) in Myanmar using artificial neural network (ANN) classification and a change detection approach with Sentinel-2 satellite images. In 2020, we conducted various experiments related to mangrove classification by tuning input features and hyper-parameters. The selected ANN model was used with a transfer learning approach to predict the mangrove distribution in 2015. Changes were detected using classification results from 2015 and 2020. Naturally recovering mangroves were identified by extracting the change detection results of three abandoned shrimp ponds selected during field investigation. The proposed method yielded an overall accuracy of 95.98%, a kappa coefficient of 0.92, mangrove and non-mangrove precisions of 0.95 and 0.98, respectively, recalls of 0.96, and F1 scores of 0.96 for the 2020 classification. For the 2015 prediction, transfer learning improved model performance, resulting in an overall accuracy of 97.20%, a kappa coefficient of 0.94, mangrove and non-mangrove precisions of 0.98 and 0.96, respectively, recalls of 0.98 and 0.97, and F1 scores of 0.96. The change detection results showed that mangrove forests in the WMF slightly decreased between 2015 and 2020. Naturally recovering mangroves were detected at approximately 50% of each abandoned site within a short abandonment period. This study demonstrates that the ANN method using Sentinel-2 imagery and topographic and canopy height data can produce reliable results for mangrove classification. The natural recovery of mangroves presents a valuable opportunity for mangrove rehabilitation at human-disturbed sites in the WMF.

Download Full-text